Melt chocolate in double boiler. Remove from boiling water, add sugar
and water, and blend. Add egg yolks, one at a time, beating well
after each. Add butter, a tablespoon at a time, beating thoroughly
after each amount. Makes enough frosting to cover the top of one 9"
layer and sides of three 9" layers, or to cover the tops and sides of
two 9" layers.
